A head-on wreck that left at least one dead and two critically injured has closed down part of Route 54 just outside Elysburg today, sources say.The accident, which left both vehicles flipped over just before noon, will keep a section of the road between Elysburg and Riverside closed until about 4 or 5 p.m., police say.Reporter Leon Bogdan is on the scene. Check back for more information online and in Monday's Press Enterprise.